adding a string to the file name for all files

Hello i have txt files in my folder,how can i change their file name by adding a string to the start of the file name so af older with aa90.txt bb90.txt cc90.txt will become str_aa90.txt str_bb90.txt str_cc90.txt

thanks

Answer 1

[Rik]

You can use the function dir find out the file names in a folder. If you Google on [rename files matlab], you can find this answer.

From here you should be able to write the code yourself. If you get errors or don't understand the help text of the functions you need, I'll be glad to help.